This works great! I wrote a python script to make it faster.
Obviously, modify to fit your needs…

Input file:

https://image.delivery/page/fbdyibj
https://image.delivery/page/gpbbxpn
https://image.delivery/page/zgojtmp

Output file will look like this:

Click on an image to see prompt details.

[![](https://fast.image.delivery/fbdyibj.jpg)][1]
[![](https://fast.image.delivery/gpbbxpn.jpg)][2]
[![](https://fast.image.delivery/zgojtmp.jpg)][3]

[1]: https://image.delivery/page/fbdyibj
[2]: https://image.delivery/page/gpbbxpn
[3]: https://image.delivery/page/zgojtmp

Script:

def convert_urls(input_file, output_file):
    with open(input_file, 'r') as f:
        urls = f.read().splitlines()

    with open(output_file, 'w') as f:
        f.write('Click on an image to see prompt details.\n\n')
        for i, url in enumerate(urls, start=1):
            id = url.split('/')[-1]
            f.write(f'[![](https://fast.image.delivery/{id}.jpg)][{i}]\n')

        f.write('\n')

        for i, url in enumerate(urls, start=1):
            f.write(f'[{i}]: {url}\n')

# Usage
convert_urls('input.txt', 'output.txt')